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WHOIS MCP Server

by kincaidyang Your server? Claim it
answering

WHOIS is answering right now. Last checked 6 min ago. It exposes 2 tools. Last commit 3 Nov 2026.

Query WHOIS/RDAP information for domains, IP addresses, CIDR prefixes and ASNs. Self-hostable.

Uptime history 91 days of history · worst day 81%
91 days agonow
94.5%
Uptime 24h
86 of 91 checks
2
Tools
read from the server
5504 ms
Response time
average over 24h
66
Stars
last commit 3 Nov 2026

What changed 4

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 22 August 2026. No other catalogue keeps this.

24 Oct a tool changed version
23 Oct a tool changed version
26 Sep a tool changed version
22 Aug a tool changed version

What the code does

We read the source, 4 d ago · tools taken from the live server · rules 995398eba69f

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

Image downloads and pipes straight to shell .ide/Dockerfile:15
    curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/HEAD/install.sh | sh -s -- -b /usr/local/bin v2.13.1 &&\

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 6 min ago.

run in your terminal
claude mcp add whois --transport http https://whois.ddnsip.cn/mcp
Settings → Connectors → Add custom connector, then paste this address
https://whois.ddnsip.cn/mcp
~/.codex/config.toml
[mcp_servers.whois]
url = "https://whois.ddnsip.cn/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "whois": {
      "url": "https://whois.ddnsip.cn/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "whois": {
      "type": "http",
      "url": "https://whois.ddnsip.cn/mcp"
    }
  }
}

Available tools 2

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

whois
whois_batch_lookup
Query WHOIS/RDAP information for multiple domain names, IP addresses/CIDR prefixes, or ASNs in one call. Results are returned per query with individual statuses. Disabled unless the operator enables batch queries.
whois_lookup
Query WHOIS/RDAP information for a domain name, IP address or CIDR prefix (v4 or v6), or ASN

Endpoints

URLTransportStateLatencyChecked
https://whois.ddnsip.cn/mcp streamable-http answering 4381 ms 6 min ago

Alternatives to WHOIS

same job, measured the same way
Whois MCP
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RDAP whois records for domains and IPs.

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MCP Ip2whois
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WHOIS domain MCP server that query the WHOIS information using IP2WHOIS API.

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DomScan
by estevecastells

Domain intelligence for DNS, WHOIS/RDAP, TLS, reputation, valuation, and brand protection.

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who.is
by who

Parsed WHOIS, RDAP, DNS, certificates, nameservers and domain history for any domain.

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Domain Intelligence
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WHOIS/RDAP, DNS, SSL, live subdomains with IPs, and SPF/DMARC/DKIM for any domain.

6 tools answering
Whois MCP Server
by cyanheads

Domain registry records and status, DNS records, and IP/ASN resolution over RDAP and DoH.

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DNS Spy
by dnsspy

DNS monitoring and domain security: live DNS, propagation, WHOIS/RDAP, SSL and look-alike domains.

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Tech Stack Detector & WHOIS, SSL Checker
by fernandoguiraud16-coder

Tech stack, WHOIS, DNS, SSL, hosting and SEO checks for lists of domains.

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WHOIS — questions

Answers built from our own checks of this server.

What can WHOIS do?
It exposes 2 tools, read directly from the server on our last check. Among them: whois_batch_lookup, whois_lookup. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is WHOIS working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 86 of 91 checks got a reply (94.5%), average response time 5504 ms. The bar chart above shows every period we have measured.
How do I connect WHOIS?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does WHOIS need an API key?
No. WHOIS completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 2 of them are readable on this page. This is what we observed, not what the docs claim.
Is WHOIS open source?
The code is open source: it is published under the MIT licence, written in Go and 66 stars on GitHub. The licence covers the code in the repository, not the hosted service at whois.ddnsip.cn, which runs on its operator's own terms.